Stratigraphic System

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

System, Stratigraphic


a basic subdivision of the international stratigraphic scale corresponding to a natural stage in the development of the earth’s crust and the organic world. The interval of time during which a system is formed is called a geological period. In the recent history of the earth, that is, in the Phanerozoic eon, 12 systems are distinguished. Their order was established in the first half of the 19th century and was accepted in 1881 in Bologna at the second session of the International Geological Congress.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Geological Survey stratigraphic system these plains are considered pre-Nectarian, that is, older than the oldest dated basin.